What is the third space velocity? Detailed answer

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What is the third space velocity? Detailed answer

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What is the third space velocity?

The third cosmic speed is the minimum speed that must be reported to a body (for example, a spacecraft) near the surface of the Earth so that it can, having overcome the gravitational attraction of the Earth and the Sun, leave the solar system forever.

The third cosmic velocity is approximately 16,6 kilometers per second (when launched at an altitude of 200 kilometers above the earth's surface), while the direction of the body's velocity relative to the Earth must coincide with the direction of the velocity of the Earth's orbital motion.

Author: Kondrashov A.P.

Random interesting fact from the Great Encyclopedia:

How does asparagus grow?

During the time of the ancient Greeks and Romans, asparagus (asparagus) was considered one of the most exquisite delicacies. However, as strange as it may seem, it still grows wild in many European countries on the Mediterranean coast, as well as in other places with sandy soil. It is so common in the steppe regions of Russia that it serves as food for grazing cattle!

About one hundred and fifty species of wild asparagus are widely found in hot and tropical countries. Many of them are cultivated, and often for purely decorative purposes. A remarkable feature of this plant is that its tender shoots are eaten, and fern-like leaves serve as decoration for the interiors of houses.

If they want to use asparagus as a food product, then its stems are cut off while the leaves have not yet blossomed from the buds and the length of the shoots does not exceed thirty to thirty-five centimeters.

Asparagus is a plant from the lily family, and, as already noted, there are many varieties of it. If the plant is allowed to grow normally, without cutting off the stems, it grows to sixty centimeters or even more, and it grows twigs, on which first small white flowers bloom, and then red shiny berries appear. Although soups, hot dishes and salads, asparagus is considered a highly refined food, its nutritional value is low due to its high water content.

Asparagus can be grown from seeds or from roots planted in shallow grooves. They should be planted where the surface layer of soil is deep enough, rich in nutrients and also contains a lot of sand. If the plant does not die in the first three years of life, then subsequently it will bear fruit annually for nine years or more. It should be remembered that it is necessary to enrich the soil every year by fertilizing it in order to get a good harvest.

Test your knowledge! Did you know...

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Random news from the Archive

Silicone instead of copper 12.02.2013

A team of researchers from IBM and Dow Corning Electronics announces a discovery that will allow silicon to displace copper in creating fast, energy-efficient photonic connections on printed circuit boards. The team demonstrated optical waveguides using a photonic polymer at Photonics West 2013 in early February.

IBM says its work with Dow Corning provides an integrated approach to optical communications, similar to how metal conductors now conduct electrical signals on traditional printed circuit boards. Silicone polymer waveguides are "highly flexible and resistant to high temperatures," says Bert-Jan Offrein, manager of the Photonics Research Group at IBM Research in Zurich. Offrain reported that neither twisting nor deformation was observed on bends with a radius of up to 1 mm, and also under extreme operating conditions at 85% humidity and a temperature of +85°C.

Silicone allows you to use the same basic element as in CMOS crystals - silicon - but in a flexible form, which allows the beam of light to pass through bends and turns with very little distortion. As a result, very fast and energy efficient photonic interconnects can be fabricated, capable of transferring the exabytes of data required for future data centers and supercomputers.

Eric Peeters, vice president of Dow Corning Electronic Solutions, predicted that the new material will enable "on-board silicon-based communications that will quickly replace conventional electronic signaling methods."

Silicone polymer is born as a liquid like other optical materials such as glass, but when left under normal atmospheric conditions, it cures in less than 45 minutes. The material also showed excellent adhesion to traditional PCB materials such as polyimide, has a loss of no more than 0,03 dB per centimeter, remains stable for more than 2000 hours at high temperature and humidity, withstands 500 temperature cycles in the range of -18 ... +120 °C.

The presentation at Photonics West "Stable and Machinable Optical Silicone for Low Loss Polymer Waveguides" was presented by Brandon Swatowski, Project Engineer at Dow Corning Electronics Solutions.

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